EP1673493B1 - A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method - Google Patents

A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method Download PDF

Info

Publication number
EP1673493B1
EP1673493B1 EP04762308A EP04762308A EP1673493B1 EP 1673493 B1 EP1673493 B1 EP 1673493B1 EP 04762308 A EP04762308 A EP 04762308A EP 04762308 A EP04762308 A EP 04762308A EP 1673493 B1 EP1673493 B1 EP 1673493B1
Authority
EP
European Patent Office
Prior art keywords
nanofibres
charged electrode
electrode
polymer solution
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP04762308A
Other languages
German (de)
French (fr)
Other versions
EP1673493A1 (en
Inventor
Oldrich Jirsak
Filip Sanetrnik
David Lukas
Vaclav Kotek
Lenka Martinova
Jiri Chaloupek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technicka Univerzita v Liberci
Original Assignee
Technicka Univerzita v Liberci
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technicka Univerzita v Liberci filed Critical Technicka Univerzita v Liberci
Priority to SI200431232T priority Critical patent/SI1673493T1/en
Priority to PL04762308T priority patent/PL1673493T3/en
Publication of EP1673493A1 publication Critical patent/EP1673493A1/en
Application granted granted Critical
Publication of EP1673493B1 publication Critical patent/EP1673493B1/en
Priority to CY20091101034T priority patent/CY1110534T1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Definitions

  • the invention relates to a method of nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode and a counter electrode, in which is the polymer solution for spinning supplied into the electric field by means of the surface of a rotating charged electrode which is by a part of its surface immersed in a polymer solution, while created nanofibres are by action of electric field drift away from rotating charged electrode towards the counter electrode and then the nanofibres are stored on a device for nanofibres storage.
  • the invention relates to a device for nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode and a counter electrode, in which is the polymer solution for spinning supplied into the electric field by means of the surface of a rotating charged electrode which is by a part of its surface immersed in a polymer solution, while created nanofibres are by action of electric field drift away from rotating charged electrode towards the counter electrode and then the nanofibres are stored on a device for nanofibres storage.
  • Nanofibres are used as battery separators, composite reinforcement and as pharmaceutical carriers and tissue implants carriers in medicine.
  • a high specific surface of nanofibres easily accessible to gaseous and liquid media predetermines for their special sorptive properties and for their use as carriers of different active ingredients, e.g. catalysators.
  • Extremely small pores in layers of nanofibres are a condition for extreme thermal insulating properties.
  • Nanofibres are made of a broad range of polymers, polymer blends and from blends of polymers with low molecular additives by processes of polymer solutions forming. Unlike in on principle similar processes of polymer melts forming is in solutions processing reached smaller diameters of fibres due to lower solutions viscosities. For solutions forming is used mechanical forces of flowing gaseous medium or coulombic forces in electrostatic field. Electrostatic spinning leads to fibres of lower diameters because single forming fibres are owing to distribution of equivalent charge in their volume split in a number of filaments.
  • a filter produced by electrostatic spraying is also known a filter produced by electrostatic spraying.
  • the material to be sprayed is moved to the electrostatic field by a conveyor made as rotating annular electrode.
  • Created nanofibers are deposited on two moving belts which are parallel to the rotating electrode. Due to continuous creation of nanofibers the concentration of polymer solution on the electrode changes and subsequently lower and lower amount of nanofibers is created. The final layer of nanofibers will be therefore non-uniform in regard to its quality and density.
  • From EP 1059106 is known a device and method for producing a fine fiber structure. Liquefied polymer is curved by a system of nobles or by wetting sharp protrusion of annular rotating electrode, but both this possibilities embody above mentioned drawbacks and none of them is capable of creation of uniform planar textile composed of nanofibers.
  • WO 03/016601 device for production of fibers by electrostatic spinning, by which is the polymer solution or melt brought to the planar spinning electrode by a rotating conveyor. After the polymer solution or melt reaches the edge of the plannar spinning electrode, it is spinned, and created nanofibers are deposited on collecting electrode. Disadvantages of this device rest namely in the fact, that polymer solution or melt will due to its large surface on the spinning electrode solidify and by contrast the overflowing polymer solution or melt will drop to the electric field where it could be spinned in a uncontrollable manner.
  • This device is not applicable in an industrial scale because is not able of continuous electrospinning for period longer than few minutes.
  • the aim of the invention is to create a method and a device industrially applicable and able to reach a high spinning capacity.
  • Fig. 1 is a cross section of a device with a counter electrode surrounding a part of the circumference of a charged electrode
  • Fig. 2 is a cross section of an embodiment of the device with a means for nanofibres storage outside of the space between the electrodes
  • Fig. 3 is a cross section of the device, where the means for nanofibres storage is formed by a plane supporting material positioned between the electrodes in the conveyance composed of stretching elements
  • Fig. 4 is an embodiment similar as Fig. 1 with a fixed electrode composed of longitudinal rods and the conveyance of plane supporting material of nanofibres arranged between these rods
  • Fig. 5a to 5e is a view at various embodiments of the surface of a cylinder presenting charged electrode from the front and from the side.
  • a device for nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a charged electrode and a counter electrode consisting of a container 1 at least partly filled with a polymer solution 2 in which is by a part of its circumference immersed pivoted cylinder 3 , which is by a well-known not represented method connected to a source of DC voltage and which forms a charged electrode 30 .
  • a counter electrode 40 with a different potential situated which is usually connected to earth (grounded), as described in Fig. 1 , or it is by a well-known not represented method connected to a source of DC voltage of a different polarity.
  • the cylinder 3 immersed in the polymer solution 2 by the bottom part of its circumference.
  • Such arrangement can be changed according to the not represented example, where with polymer solution is filled a closed container, from which is on surface of the charged electrode distributed the polymer solution or the cylinder presenting the charged electrode is in such closed container positioned, while the polymer solution is wetting for example the top part of the circumference of the cylinder, which draws on its circumference appropriate amount of the polymer solution from the container.
  • the counter electrode 40 made of a perforated conducing material, e.g. sheet metal, shaped in a cylindrical surface, which forms the front end of a vacuum chamber 5 , which is connected to a vacuum source 6 .
  • a part of the surface of the counter electrode 40 near the charged electrode 30 serves as a conveyance 41 for plane supporting material 72 of the nanofibres pervious to air, which is for example made of a backing fabric and which is positioned on an unreeling device 81 arranged on one side of the vacuum chamber 5 and on the reeling device 82 , which is arranged on the other side of the vacuum chamber 5 .
  • the plane supporting material 72 of the nanofibres forms in itself a means 7 for nanofibres storage pervious to air.
  • the polymer solution 2 container 1 is open and fitted with at least one polymer solution 2 inlet 11 and at least one polymer solution 2 outlet 12.
  • the mentioned polymer solution inlet 11 and outlet 12 serves to provide circulation of the polymer solution 2 and to maintain the constant height of its level in the container 1 .
  • auxiliary drying air 9 supply assigned, which can be according to the well-known manner heated up as needed, for example using a heating device arranged in the auxiliary drying air 9 supply.
  • the auxiliary drying air 9 is from the space between the charged electrode 30 and the counter electrode 40 either completely or partly sucked into the vacuum chamber 5 or it comes out on the other side than it is supplied.
  • the polymer solution 2 drawn by the circumference of the charged electrode 30 from the container 1 into the space between the charged electrode 30 and the counter electrode 40 , where an electric field is formed.
  • the surface of the charged electrode 30 are from the polymer solution 2 formed Taylor cones of a high stability and they present places of primary formation of the nanofibres 20 .
  • the formed nanofibres 20 are by the effects of electric field drift away to the counter electrode 40 and consequently they are deposited on the surface of the backing fabric presenting plane supporting material 72 of the nanofibres into a layer, which thickness is controlled using the velocity of the unreeling device 81 and the reeling device 82.
  • the drift of the nanofibres 20 away of the charged electrode 30 to the counter electrode 40 is promoted by streaming of air sucked from the outer space into the vacuum chamber 5 and passing along the polymer solution 2 container 1 and the charged electrode 30 and passing through the backing fabric presenting plane supporting material 72 of the nanofibres and the counter electrode 40.
  • auxiliary rods 410 forming conveyance 41 for plane supporting material 72 of the nanofibres that forms the means 7 for nanofibres storage. Nevertheless, some or all of the auxiliary rods 410 can be rotable to lower friction drag while conveying the supporting material 72 of the nanofibres.
  • the conveyance for the supporting material 72 of the nanofibres can be in this embodiment composed also of rods 400 forming counter electrode 40.
  • the nanofibres 20 are produced in a high number so the limiting factor of the spinning device capacity is the evaporation rate of the polymer solvent from produced nanofibres 20 and the rate of drawing off of the evaporated solvent, which would in a short period create a saturated vapour state not permitting another solvent evaporation in the space between the charged electrode 30 and the counter electrode 40.
  • the device is therefore fitted with the auxiliary drying air 9 supply, which provides drawing off of the solvent vapours especially from the space between the charged electrode 30 and the counter electrode 40 . To increase the effect this auxiliary drying air 9 can be heated up.
  • Fig. 2 where as well as in the embodiment according to the Fig. 1 the charged electrode 30 is pivoted and by a part of its circumference it is positioned in the polymer solution 2 , which is in the container 1 and its circulation and the level in the container 1 is maintained by flowing of the polymer solution 2 through the inlet 11 and the outlet 12 .
  • the counter electrode 40 positioned composed of a system of wires or rods connected to earth (grounded) or by a well-known not represented manner connected to a source of DC voltage of opposite polarity than the charged electrode 30 .
  • the nanofibres 20 directing due to the action of electric field from the charged electrode 30 to the counter electrode 40 are by the action of air stream sucked into the vacuum chamber 5 deflected from their course and are drift onto the conveyor 71 pervious to air, onto which surface they are stored in a layer, which is by the motion of the conveyor 71 carried out of the device and consequently by an appropriate not represented manner processed, conditioned or stored.
  • the device fitted with the inlet 90 of auxiliary drying air 9 , which enters the device casing in the direction to the conveyor 71 pervious to air, which further promotes deflecting the nanofibres 20 from the course to the counter electrode 40 to the direction to the conveyor 71 pervious to air.
  • Fig. 3 an embodiment of the device consisting of pivoted charged electrode 30 immersed by bottom part of its circumference into the polymer solution 2 .
  • the counter electrode 40 composed of a system of rods parallel to the axis of rotation of the charged electrode 30 and through the space between the electrodes 30 , 40 is conveyed the plane supporting material 72 of the nanofibres using conveyance 41 composed of stretching elements 42.
  • the charged electrode 30 is composed of a body able to rotate, for example a cylinder, quadrangular or multiangular prism and the like, while it is advantageous if the axis of rotation is at the same time the axis of symmetry of the used body.
  • the cylinder 3 is on the circumference fitted with lugs 31 and/or recesses 32 . Examples of shapes of the cylinder surface appropriate for the charged electrode are described in the Fig. 5a to 5e , while these shapes do not limit all possible embodiments but serve only as an example. In up to now described embodiments, there is created a steady electric field between the electrodes.
  • the device is possible to be fit with means for creating an intermittent electric field if it is necessary for creating or storage of the nanofibres 20 layer.
  • the viscosity of the solution is 230 mPa.s at 20 °C, specific electric conductivity 31 mS/cm and surface tension 38 mN/m.
  • the polymer solution 2 flows into the container 1 through an inlet 11 and flows off through an outlet 12 while the level height of the polymer solution 2 in the container 1 is maintained using the position of the outlet 12 .
  • the charged electrode 30 consists of a cylinder 3 of 30 mm in diameter in the embodiment according to the Fig. 5c and it is rotating clockwise in 2,5 RPM.
  • the cylinder 3 is connected to +40 kV DC voltage source.
  • the device is manufactured according the Fig. 1 and throughout it is led a backing fabric forming a plane supporting material 72 of the nanofibres. Owing to the low pressure in the low pressure chamber 6 behind the counter electrode 40 pervious to air, the plane material abuts to the counter electrode 40 , which forms this way the plane material conveyance.
  • the surface of the rotating cylinder 3 draws the polymer solution 2 out of the container 1 and owing to the electric field between the electrodes 30 , 40 it forms Taylor cones and the nanofibres 2 in diameters 50 to 200 nanometers.
  • the nanofibres 20 are drift away to the counter electrode 40 and they are stored on the running backing fabric, where they form a layer of thickness that can be controlled by the movement speed of the backing fabric.
  • an auxiliary drying air 9 of the temperature of 50°C supplied is Into the space between the electrodes.
  • the layer of nanofibres is produced in the amount of 1,5 g/min for one meter length of rotating cylinder 3.
  • the viscosity of the solution is 260 mPa.s at 20 °C, its specific electric conductivity has been adjusted by an addition of a small amount of aqueous NaCl solution to 25 mS/cm and the surface tension has been adjusted by addition of 0,25 % nonionogene surface active agent to 36 mN/m.
  • the polymer solution 2 flows into the container 1 through an inlet 11 and flows off through an outlet 12 , where its position determines the level height of the polymer solution 2 in the container 1 .
  • the cylinder 3 presenting the charged electrode is 50 mm in diameter and has a smooth surface described in the Fig. 5a .
  • the cylinder 3 is connected to +40 kV DC voltage source and the wire counter electrode 40 to negative 5 kV DC voltage source.
  • nanofibres 20 In the space between the charged electrode 30 and the counter electrode 40 are produced nanofibres 20 in a diameter of 50 to 200 nanometers, which are by the air sucked from the space between the electrodes 30 , 40 into the vacuum chamber 5 and using the auxiliary drying air 9 drift to the surface of the conveyor 71 pervious to air, where they are stored in a fibre layer in the amount of 1,8 g/min for one meter length of rotating cylinder.
  • a method and a device according to the invention are applicable for production of layers of nanofibres in diameters from 50 to 200 nanometers. These layers can be used for filtration, as battery separators, for production of special composites, for construction of sensors with extremely low time constant, for production of protective clothes, in medicine and other fields.

Abstract

A method of nanofibers production from a polymer solution uses electrostatic spinning in an electric field created by a potential difference between a charged electrode and a counter electrode. The polymer solution for spinning is supplied into the electric field using the surface of a rotating charged electrode. On a part of the circumference of the charged electrode near to the counter electrode, a spinning surface is created for attaining a high spinning capacity. In a device for carrying out the method, the charged electrode is pivoted and part of its circumference is immersed in the polymer solution. The free part of the circumference of the charged electrode is positioned opposite the counter electrode.

Description

    Technical field
  • The invention relates to a method of nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode and a counter electrode, in which is the polymer solution for spinning supplied into the electric field by means of the surface of a rotating charged electrode which is by a part of its surface immersed in a polymer solution, while created nanofibres are by action of electric field drift away from rotating charged electrode towards the counter electrode and then the nanofibres are stored on a device for nanofibres storage.
  • Further the invention relates to a device for nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode and a counter electrode, in which is the polymer solution for spinning supplied into the electric field by means of the surface of a rotating charged electrode which is by a part of its surface immersed in a polymer solution, while created nanofibres are by action of electric field drift away from rotating charged electrode towards the counter electrode and then the nanofibres are stored on a device for nanofibres storage.
    • Background art
  • Polymer fibres with diameters between 10 nm to 1.000 nm represent a new grade of materials with some properties of extreme values. Such a typical field of use of polymer fibres layers is a filtration of gases and liquids, barrier materials for entrapment of submicron particles, bacteria and chemicals, where there is a very high filtering efficiency reached. Nanofibres are used as battery separators, composite reinforcement and as pharmaceutical carriers and tissue implants carriers in medicine. A high specific surface of nanofibres easily accessible to gaseous and liquid media predetermines for their special sorptive properties and for their use as carriers of different active ingredients, e.g. catalysators. Extremely small pores in layers of nanofibres are a condition for extreme thermal insulating properties.
  • Nanofibres are made of a broad range of polymers, polymer blends and from blends of polymers with low molecular additives by processes of polymer solutions forming. Unlike in on principle similar processes of polymer melts forming is in solutions processing reached smaller diameters of fibres due to lower solutions viscosities. For solutions forming is used mechanical forces of flowing gaseous medium or coulombic forces in electrostatic field. Electrostatic spinning leads to fibres of lower diameters because single forming fibres are owing to distribution of equivalent charge in their volume split in a number of filaments.
  • Up to the day known methods and devices for production of nanofibres by polymer solutions forming by an air stream are described for example in US 6.382.526 and US 6.520.425 . Polymer solutions are injected into a spinning jet of an annular section. The solutions are then formed by a mechanical action of an air stream delivered inside of the annulus, or as the case may be outside of this annulus, to produce fibres of diameters of 200 nm to 3.000 nm.
  • Forming of polymer solutions using electrostatic field of mean intensity 50.000 V/m to 500.000 elm is described in patent applications WO 0.127.365 , WO 0.250.346 , US 2002/0.175.449 A1 and US 2002/084.178 A1 . According to these solutions is the polymer solution distributed into cylindrical spinning jets with inside diameter 0,5 mm to 1,5 mm. These jets are connected to a source of DC voltage. The effluent solvent is by the electrostatic force attracted to the counter electrode, which is usually grounded and at the same time it is by this force formed into fine filaments, which are consequently split in a filament bundle of corresponding smaller diameter. Spinning is performed from one jet or an array of static or moving jets with aim to increase the capacity of the device, even coverage of counter electrode or plane supporting material moving on a surface of counter electrode or in the vicinity of its surface.
  • The drawback of all above mentioned methods and devices for nanofibres production is a very small amount of processed polymer material in time. In the case of nanofibres forming by mechanical forces the diameter of produced nanofibres depends among others on a ratio of air mass and polymer solution flowing through the spinning jet. While forming by coulombic force in electrostatic field, there must be formed so called Taylor cone at the throat of the spinning jet, whose existence is a requirement for fibres formation and it is conditioned by a relatively narrow range of ratio of discharge velocity of the polymer solvent from the spinning jet to the intensity of electrostatic field. The maximum adjustable intensity of electrostatic field is limited by dielectric strength of air and above this limit discharges between electrodes happen. In consequence of above mentioned circumstances and attainable concentrations of spinning polymer solutions it is possible to process approximately 0,1 g to 1 g of polymer in an hour in one spinning jet, which from the industrial point of view makes the production of nanofibres very problematic.
  • From GB 1346231 is also known a filter produced by electrostatic spraying. The material to be sprayed is moved to the electrostatic field by a conveyor made as rotating annular electrode. Created nanofibers are deposited on two moving belts which are parallel to the rotating electrode. Due to continuous creation of nanofibers the concentration of polymer solution on the electrode changes and subsequently lower and lower amount of nanofibers is created. The final layer of nanofibers will be therefore non-uniform in regard to its quality and density. From EP 1059106 is known a device and method for producing a fine fiber structure. Liquefied polymer is curved by a system of nobles or by wetting sharp protrusion of annular rotating electrode, but both this possibilities embody above mentioned drawbacks and none of them is capable of creation of uniform planar textile composed of nanofibers.
  • Besides is describes WO 03/016601 device for production of fibers by electrostatic spinning, by which is the polymer solution or melt brought to the planar spinning electrode by a rotating conveyor. After the polymer solution or melt reaches the edge of the plannar spinning electrode, it is spinned, and created nanofibers are deposited on collecting electrode. Disadvantages of this device rest namely in the fact, that polymer solution or melt will due to its large surface on the spinning electrode solidify and by contrast the overflowing polymer solution or melt will drop to the electric field where it could be spinned in a uncontrollable manner. This device is not applicable in an industrial scale because is not able of continuous electrospinning for period longer than few minutes.
  • The aim of the invention is to create a method and a device industrially applicable and able to reach a high spinning capacity.
    • Principle of the invention
  • The aim of the invention has been reached by a method according to claim 1 and by the device according to claim 7.
  • Advantageous features of the method and device are in dependent claims.
  • Features of preamble of claims 1 and 7 are known from GB 1 346 231 , which is considered to be the closest prior art.
    • Description of the drawing
  • Examples of a device embodiment according to the invention are schematically shown in the enclosed drawings where Fig. 1 is a cross section of a device with a counter electrode surrounding a part of the circumference of a charged electrode, Fig. 2 is a cross section of an embodiment of the device with a means for nanofibres storage outside of the space between the electrodes, Fig. 3 is a cross section of the device, where the means for nanofibres storage is formed by a plane supporting material positioned between the electrodes in the conveyance composed of stretching elements, Fig. 4 is an embodiment similar as Fig. 1 with a fixed electrode composed of longitudinal rods and the conveyance of plane supporting material of nanofibres arranged between these rods, Fig. 5a to 5e is a view at various embodiments of the surface of a cylinder presenting charged electrode from the front and from the side.
    • Specific description
  • A device for nanofibres production from a polymer solution using electrostatic spinning in an electric field created by a potential difference between a charged electrode and a counter electrode consisting of a container 1 at least partly filled with a polymer solution 2 in which is by a part of its circumference immersed pivoted cylinder 3, which is by a well-known not represented method connected to a source of DC voltage and which forms a charged electrode 30. Against a free part of the circumference of the charged electrode 30 is a counter electrode 40 with a different potential situated, which is usually connected to earth (grounded), as described in Fig. 1, or it is by a well-known not represented method connected to a source of DC voltage of a different polarity.
  • In the not represented embodiments is the cylinder 3 immersed in the polymer solution 2 by the bottom part of its circumference. Such arrangement can be changed according to the not represented example, where with polymer solution is filled a closed container, from which is on surface of the charged electrode distributed the polymer solution or the cylinder presenting the charged electrode is in such closed container positioned, while the polymer solution is wetting for example the top part of the circumference of the cylinder, which draws on its circumference appropriate amount of the polymer solution from the container.
  • In the example of embodiment shown in Fig. 1 is the counter electrode 40 made of a perforated conducing material, e.g. sheet metal, shaped in a cylindrical surface, which forms the front end of a vacuum chamber 5, which is connected to a vacuum source 6. A part of the surface of the counter electrode 40 near the charged electrode 30 serves as a conveyance 41 for plane supporting material 72 of the nanofibres pervious to air, which is for example made of a backing fabric and which is positioned on an unreeling device 81 arranged on one side of the vacuum chamber 5 and on the reeling device 82, which is arranged on the other side of the vacuum chamber 5. In this represented embodiment the plane supporting material 72 of the nanofibres forms in itself a means 7 for nanofibres storage pervious to air.
  • The polymer solution 2 container 1 is open and fitted with at least one polymer solution 2 inlet 11 and at least one polymer solution 2 outlet 12. The mentioned polymer solution inlet 11 and outlet 12 serves to provide circulation of the polymer solution 2 and to maintain the constant height of its level in the container 1.
  • To the space between the charged electrode 30 and the counter electrode 40 is an auxiliary drying air 9 supply assigned, which can be according to the well-known manner heated up as needed, for example using a heating device arranged in the auxiliary drying air 9 supply. The auxiliary drying air 9 is from the space between the charged electrode 30 and the counter electrode 40 either completely or partly sucked into the vacuum chamber 5 or it comes out on the other side than it is supplied.
  • By rotating the charged electrode 30, where its part of its circumference is immersed in the polymer solution 2, is the polymer solution 2 drawn by the circumference of the charged electrode 30 from the container 1 into the space between the charged electrode 30 and the counter electrode 40, where an electric field is formed. Here on the surface of the charged electrode 30 are from the polymer solution 2 formed Taylor cones of a high stability and they present places of primary formation of the nanofibres 20. The formed nanofibres 20 are by the effects of electric field drift away to the counter electrode 40 and consequently they are deposited on the surface of the backing fabric presenting plane supporting material 72 of the nanofibres into a layer, which thickness is controlled using the velocity of the unreeling device 81 and the reeling device 82.
  • The drift of the nanofibres 20 away of the charged electrode 30 to the counter electrode 40 is promoted by streaming of air sucked from the outer space into the vacuum chamber 5 and passing along the polymer solution 2 container 1 and the charged electrode 30 and passing through the backing fabric presenting plane supporting material 72 of the nanofibres and the counter electrode 40.
  • In the embodiment shown in Fig. 4 is the counter electrode 40 manufactured using another appropriate method, for example from rods 400 parallel to the pivoted cylinder 3 presenting the charged electrode 30. Between the rods 400 forming the counter electrode 40 there are arranged auxiliary rods 410 forming conveyance 41 for plane supporting material 72 of the nanofibres that forms the means 7 for nanofibres storage. Nevertheless, some or all of the auxiliary rods 410 can be rotable to lower friction drag while conveying the supporting material 72 of the nanofibres. The conveyance for the supporting material 72 of the nanofibres can be in this embodiment composed also of rods 400 forming counter electrode 40. In the described device the nanofibres 20 are produced in a high number so the limiting factor of the spinning device capacity is the evaporation rate of the polymer solvent from produced nanofibres 20 and the rate of drawing off of the evaporated solvent, which would in a short period create a saturated vapour state not permitting another solvent evaporation in the space between the charged electrode 30 and the counter electrode 40. The device is therefore fitted with the auxiliary drying air 9 supply, which provides drawing off of the solvent vapours especially from the space between the charged electrode 30 and the counter electrode 40. To increase the effect this auxiliary drying air 9 can be heated up.
  • The next example according to the invention is described in Fig. 2, where as well as in the embodiment according to the Fig. 1 the charged electrode 30 is pivoted and by a part of its circumference it is positioned in the polymer solution 2, which is in the container 1 and its circulation and the level in the container 1 is maintained by flowing of the polymer solution 2 through the inlet 11 and the outlet 12. Against the free part of the circumference of the pivoted charged electrode 30, there is the counter electrode 40 positioned composed of a system of wires or rods connected to earth (grounded) or by a well-known not represented manner connected to a source of DC voltage of opposite polarity than the charged electrode 30. Outside of the space between the electrodes (30, 40), where the electrostatic field is created and where by electrostatic spinning the nanofibres 20 from the polymer solution 2 are produced, there is positioned a conveyor 71 of nanofibres pervious to air, which form the device 7 for nanofibres storage behind which is arranged the vacuum chamber 5 connected to the vacuum source 6.
  • The nanofibres 20 directing due to the action of electric field from the charged electrode 30 to the counter electrode 40 are by the action of air stream sucked into the vacuum chamber 5 deflected from their course and are drift onto the conveyor 71 pervious to air, onto which surface they are stored in a layer, which is by the motion of the conveyor 71 carried out of the device and consequently by an appropriate not represented manner processed, conditioned or stored. For the aim to increase the amount of air in the space between the electrodes 30, 40 is the device fitted with the inlet 90 of auxiliary drying air 9, which enters the device casing in the direction to the conveyor 71 pervious to air, which further promotes deflecting the nanofibres 20 from the course to the counter electrode 40 to the direction to the conveyor 71 pervious to air.
  • Also in this embodiment there is a possibility of various modifications in arrangement and shape of the counter electrodes. There is also possibility to insert in front of the conveyor 71 pervious to air a backing fabric or another plane supporting material 72 and the layer of the nanofibres 20 can be stored onto this plane supporting material 72.
  • In the Fig. 3 is described an embodiment of the device consisting of pivoted charged electrode 30 immersed by bottom part of its circumference into the polymer solution 2. Against the free part of the circumference of the pivoted charged electrode 30, there is positioned the counter electrode 40 composed of a system of rods parallel to the axis of rotation of the charged electrode 30 and through the space between the electrodes 30, 40 is conveyed the plane supporting material 72 of the nanofibres using conveyance 41 composed of stretching elements 42.
  • The charged electrode 30 is composed of a body able to rotate, for example a cylinder, quadrangular or multiangular prism and the like, while it is advantageous if the axis of rotation is at the same time the axis of symmetry of the used body. The cylinder 3 is on the circumference fitted with lugs 31 and/or recesses 32. Examples of shapes of the cylinder surface appropriate for the charged electrode are described in the Fig. 5a to 5e, while these shapes do not limit all possible embodiments but serve only as an example. In up to now described embodiments, there is created a steady electric field between the electrodes. The device is possible to be fit with means for creating an intermittent electric field if it is necessary for creating or storage of the nanofibres 20 layer.
  • Specific examples are described below.
    • Example of embodiment 1
  • The polymer solution 2 container 1 of the device according to the Fig. 1 is being filled with 12% aqueous polyvinyl alcohol solution with 88 % degree of hydrolysis of a molecular weight Mw = 85.000, containing 5 mole per cent citric acid as a crosslinking agent referred to structural units of the polymer. The viscosity of the solution is 230 mPa.s at 20 °C, specific electric conductivity 31 mS/cm and surface tension 38 mN/m. The polymer solution 2 flows into the container 1 through an inlet 11 and flows off through an outlet 12 while the level height of the polymer solution 2 in the container 1 is maintained using the position of the outlet 12. The charged electrode 30 consists of a cylinder 3 of 30 mm in diameter in the embodiment according to the Fig. 5c and it is rotating clockwise in 2,5 RPM. The cylinder 3 is connected to +40 kV DC voltage source. The device is manufactured according the Fig. 1 and throughout it is led a backing fabric forming a plane supporting material 72 of the nanofibres. Owing to the low pressure in the low pressure chamber 6 behind the counter electrode 40 pervious to air, the plane material abuts to the counter electrode 40, which forms this way the plane material conveyance. The surface of the rotating cylinder 3 draws the polymer solution 2 out of the container 1 and owing to the electric field between the electrodes 30, 40 it forms Taylor cones and the nanofibres 2 in diameters 50 to 200 nanometers. The nanofibres 20 are drift away to the counter electrode 40 and they are stored on the running backing fabric, where they form a layer of thickness that can be controlled by the movement speed of the backing fabric. Into the space between the electrodes is an auxiliary drying air 9 of the temperature of 50°C supplied. The layer of nanofibres is produced in the amount of 1,5 g/min for one meter length of rotating cylinder 3.
    • Example of embodiment 2
  • The polymer solution 2 container 1 of the device according to the Fig. 2 is being filled with 10% aqueous polyvinyl alcohol solution with 98 % degree of hydrolysis of a molecular weight Mw = 120.000, containing 5 mole per cent citric acid as a crosslinking agent referred to structural units of the polymer. The viscosity of the solution is 260 mPa.s at 20 °C, its specific electric conductivity has been adjusted by an addition of a small amount of aqueous NaCl solution to 25 mS/cm and the surface tension has been adjusted by addition of 0,25 % nonionogene surface active agent to 36 mN/m. The polymer solution 2 flows into the container 1 through an inlet 11 and flows off through an outlet 12, where its position determines the level height of the polymer solution 2 in the container 1. The cylinder 3 presenting the charged electrode is 50 mm in diameter and has a smooth surface described in the Fig. 5a. The cylinder 3 is connected to +40 kV DC voltage source and the wire counter electrode 40 to negative 5 kV DC voltage source. In the space between the charged electrode 30 and the counter electrode 40 are produced nanofibres 20 in a diameter of 50 to 200 nanometers, which are by the air sucked from the space between the electrodes 30, 40 into the vacuum chamber 5 and using the auxiliary drying air 9 drift to the surface of the conveyor 71 pervious to air, where they are stored in a fibre layer in the amount of 1,8 g/min for one meter length of rotating cylinder.
    • Industrial applicability
  • A method and a device according to the invention are applicable for production of layers of nanofibres in diameters from 50 to 200 nanometers. These layers can be used for filtration, as battery separators, for production of special composites, for construction of sensors with extremely low time constant, for production of protective clothes, in medicine and other fields.

Claims (16)

  1. A method of nanofibres production from a polymer solution (2) using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode (30) and a counter electrode (40), in which is the polymer solution (2) for spinning supplied into the electric field by means of the surface of a rotating charged electrode (30) which is by a part of its surface immersed in a polymer solution (2), while created nanofibres (20) are by action of electric field drift away from rotating charged electrode (30) towards the counter electrode (40) and then the nanofibres (20) are stored on a device (7) for nanofibres (20) storage characterized by that the nanofibres (20) are created from the surface of cylinder or quadrangular or multiangular prism charged electrode (30), while the counter electrode (40) is positioned against the free part of the circumference of the charged electrode (30) and the air between charged electrode (30) and the counter electrode (40) is sucked off.
  2. A method as claimed in Claim 1, characterized by that the nanofibres (20) are by the air suction off deflected from their course towards the counter electrode (40) and are led to the device (7) for nanofibres (20) storage.
  3. A method as claimed in any of Claims 1 or 2, characterized by that into the space between the electrodes (30, 40) is supplied an auxiliary drying air (9).
  4. A method as claimed in Claim 3, characterized by that at least a part of the auxiliary drying air (9) is drawn off the space in front of the device (7) for nanofibres (20) storage, without passing through this device (7).
  5. A method as claimed in any of Claims 3 or 4, characterized by that the auxiliary drying air (9) is heated up before entering the space between electrodes (30, 40).
  6. A method as claimed in any of Claims 1 to 5, characterized by that the polymer solution (2) is composed of a water solution.
  7. Device for nanofibres production from a polymer solution (2) using electrostatic spinning in an electric field created by a potential difference between a rotating charged electrode (30) and a counter electrode (40), in which is the polymer solution (2) for spinning supplied into the electric field by means of the surface of a rotating charged electrode (30) which is by a part of its surface immersed in a polymer solution (2), while created nanofibres (20) are by action of electric field drift away from rotating charged electrode (30) towards the counter electrode (40) and then the nanofibres (20) are stored on a device (7) for nanofibres (20) storage characterized by that the charged electrode (30) is a cylinder or quadrangular or multiangular prism and against the free part of the circumference of the charged electrode (30), there is the counter electrode (40) positioned.
  8. Device as claimed in Claim 7, characterized by that the counter electrode (40) surrounds the free parts of the circumference of the charged electrode (30) along its entire length.
  9. A device as claimed in Claim 7 or 8, characterized by that between both electrodes (30, 40) is situated the device (7) for nanofibres storage.
  10. A device as claimed in Claim 9, characterized by that the device (7) for nanofibres storage is pervious to air, while the space behind this device (7) in regard to the charged electrode (30) is connected to the vacuum source (6).
  11. A device as claimed in Claim 7, characterized by that outside of the space between the electrodes (30, 40) there is positioned the device (7) for nanofibres storage pervious to air, while the space behind this device (7) in regard to the charged electrode (30) is connected to the vacuum source (6) serving to create an air stream directing towards this device (7).
  12. A device as claimed in any of Claims 7 to 11, characterized by that the device (7) for nanofibres storage is composed of a conveyor (71) pervious to air.
  13. A device as claimed in any of Claims 7 to 11, characterized by that the device (7) for nanofibres storage is composed of a plane supporting material of the nanofibres (72).
  14. A device as claimed in any of Claims 7 to 13, characterized by that into the space between the electrodes (30, 40) leads an inlet (90) of auxiliary drying air (9).
  15. A device as claimed in Claim 14, characterized by that in the inlet (90) of auxiliary drying air (9), there is positioned an air heating device.
  16. A device as claimed in Claim 13 or 15, characterized by that at least a part of air is drawn off the space in front of the device (7) for nanofibres storage in regard of the charged electrode (30), without passing through this device (7).
EP04762308A 2003-09-08 2004-09-08 A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method Active EP1673493B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SI200431232T SI1673493T1 (en) 2003-09-08 2004-09-08 A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method
PL04762308T PL1673493T3 (en) 2003-09-08 2004-09-08 A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method
CY20091101034T CY1110534T1 (en) 2003-09-08 2009-10-07 METHOD OF MANUFACTURING NANOINS FROM POLYMER SOLUTION USING ELECTROSTATIC SOLUTION AND APPLIANCE FOR IMPLEMENTING THE METHOD

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20032421A CZ294274B6 (en) 2003-09-08 2003-09-08 Process for producing nanofibers from polymeric solution by electrostatic spinning and apparatus for making the same
PCT/CZ2004/000056 WO2005024101A1 (en) 2003-09-08 2004-09-08 A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method

Publications (2)

Publication Number Publication Date
EP1673493A1 EP1673493A1 (en) 2006-06-28
EP1673493B1 true EP1673493B1 (en) 2009-07-08

Family

ID=33304495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04762308A Active EP1673493B1 (en) 2003-09-08 2004-09-08 A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method

Country Status (21)

Country Link
US (1) US7585437B2 (en)
EP (1) EP1673493B1 (en)
JP (1) JP4439012B2 (en)
KR (1) KR101143934B1 (en)
CN (1) CN1849418B (en)
AT (1) ATE435934T1 (en)
AU (1) AU2004270787B2 (en)
BR (1) BRPI0414163A (en)
CA (1) CA2536595C (en)
CY (1) CY1110534T1 (en)
CZ (1) CZ294274B6 (en)
DE (1) DE602004021951D1 (en)
DK (1) DK1673493T3 (en)
ES (1) ES2329578T3 (en)
IL (1) IL173881A (en)
PL (1) PL1673493T3 (en)
PT (1) PT1673493E (en)
RU (1) RU2365686C2 (en)
SI (1) SI1673493T1 (en)
WO (1) WO2005024101A1 (en)
ZA (1) ZA200601791B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ304099B6 (en) * 2012-12-17 2013-10-16 Technická univerzita v Liberci Method of and apparatus for producing nanofibrous fabric, especially for colonization with living organisms
US8647540B2 (en) 2011-02-07 2014-02-11 Fiberio Technology Corporation Apparatuses having outlet elements and methods for the production of microfibers and nanofibers
US8721319B2 (en) 2008-03-17 2014-05-13 Board of Regents of the University to Texas System Superfine fiber creating spinneret and uses thereof
US9623352B2 (en) 2010-08-10 2017-04-18 Emd Millipore Corporation Method for retrovirus removal
US9750829B2 (en) 2009-03-19 2017-09-05 Emd Millipore Corporation Removal of microorganisms from fluid samples using nanofiber filtration media
US9931777B2 (en) 2013-12-10 2018-04-03 The University Of Akron Simple device for economically producing electrospun fibers at moderate rates
US10675588B2 (en) 2015-04-17 2020-06-09 Emd Millipore Corporation Method of purifying a biological material of interest in a sample using nanofiber ultrafiltration membranes operated in tangential flow filtration mode
US11154821B2 (en) 2011-04-01 2021-10-26 Emd Millipore Corporation Nanofiber containing composite membrane structures
WO2023237139A1 (en) * 2022-06-09 2023-12-14 Technicka Univerzita V Liberci A method of producing a linear nanofibrous structure in an alternating electric field, a device for performing this method and a device for producing a nanofibrous thread

Families Citing this family (196)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100334267C (en) * 2005-03-25 2007-08-29 东南大学 Device and method for preparing combined continuous electro-spinning nano fibrous membrane
US7311050B2 (en) 2005-04-19 2007-12-25 Kamterter Ii, L.L.C. Systems for the control and use of fluids and particles
US8308075B2 (en) 2005-04-19 2012-11-13 Kamterter Products, Llc Systems for the control and use of fluids and particles
US7536962B2 (en) 2005-04-19 2009-05-26 Kamterter Ii, L.L.C. Systems for the control and use of fluids and particles
CZ299537B6 (en) 2005-06-07 2008-08-27 Elmarco, S. R. O. Method of and apparatus for producing nanofibers from polymeric solution using electrostatic spinning
CZ305244B6 (en) * 2005-11-10 2015-07-01 Elmarco S.R.O. Process for producing nanofibers by electrostatic spinning of solutions or melts of polymers and apparatus for making the same
KR101147726B1 (en) * 2006-03-28 2012-05-25 코오롱패션머티리얼 (주) Method of manufacturing nanofiber web
CZ304668B6 (en) * 2006-04-12 2014-08-27 Elmarco S.R.O. Process of and apparatus for producing nanofibers by electrostatic spinning of polymer melts or solutions
JP4914750B2 (en) * 2006-04-19 2012-04-11 出光テクノファイン株式会社 Hazardous substance adsorbent and method for producing harmful substance adsorbent
CN1861268A (en) * 2006-05-29 2006-11-15 张爱华 Interfacial boost type spinning-nozzle free electrofluid dynamic method, and its application
CZ2006359A3 (en) * 2006-06-01 2007-12-12 Elmarco, S. R. O. Device for producing nanofibers by electrostatic spinning of polymeric solutions
JP4830992B2 (en) * 2006-07-05 2011-12-07 パナソニック株式会社 Method and apparatus for producing nanofiber and polymer web
JP3918179B1 (en) * 2006-07-21 2007-05-23 廣瀬製紙株式会社 Method for producing fine fiber assembly
JP4965188B2 (en) * 2006-08-10 2012-07-04 日本バイリーン株式会社 Polymer solution supply member, electrospinning apparatus, and method for producing electrospun nonwoven fabric
JP4800879B2 (en) * 2006-08-25 2011-10-26 日本バイリーン株式会社 Polymer solution supply member, electrospinning apparatus, and method for producing electrospun nonwoven fabric
CZ299549B6 (en) * 2006-09-04 2008-08-27 Elmarco, S. R. O. Rotary spinning electrode
CN100436701C (en) * 2006-11-03 2008-11-26 湘潭大学 Method for preparing super fine light conductive fibre
DE112007002799T5 (en) 2006-11-24 2009-10-01 Panasonic Corp., Kadoma Method and device for producing nanofibers and a polymer fleece
TWI306909B (en) 2006-12-21 2009-03-01 Taiwan Textile Res Inst Electrostatic spinning apparatus
TW200848561A (en) * 2006-12-22 2008-12-16 Body Organ Biomedical Corp Device for manufacturing fibrils
CZ2007108A3 (en) * 2007-02-12 2008-08-20 Elmarco, S. R. O. Method of and apparatus for producing a layer of nano particles or a layer of nano fibers from solutions or melts of polymers
JP5217190B2 (en) * 2007-03-07 2013-06-19 東洋紡株式会社 Manufacturing method of fiber assembly
CZ17577U1 (en) * 2007-03-08 2007-06-11 Elmarco S. R. O. Apparatus for producing nanofibers and/or nanoparticles from polymer solutions or melts in electrostatic field tls
CZ2007179A3 (en) * 2007-03-08 2008-09-17 Elmarco S. R. O. Linear fibrous formation containing polymeric nanofibers, process of its manufacture and apparatus for producing such formation su
JPWO2008111609A1 (en) * 2007-03-14 2010-06-24 日東紡績株式会社 Method for producing silica fiber
JP4523013B2 (en) * 2007-03-22 2010-08-11 パナソニック株式会社 Nonwoven fabric manufacturing equipment
JP5140886B2 (en) * 2007-05-07 2013-02-13 帝人株式会社 Composite fiber structure
DE102007027014A1 (en) 2007-06-08 2008-12-18 Rainer Busch Spinning nano- and micro-fibers, rapidly accelerates stratified polymers and polymer solutions whilst applying electrical field to modify physical- and surface properties
CZ2007485A3 (en) 2007-07-17 2009-04-22 Elmarco, S. R. O. Method for spinning the liquid matrix, device for production of nanofibres through electrostatic spinning of liquid matrix and spinning electrode for such device
CZ2007716A3 (en) 2007-10-15 2009-04-29 Elmarco S. R. O. Process for producing nanifibers
JP4853452B2 (en) * 2007-10-17 2012-01-11 パナソニック株式会社 Nanofiber manufacturing equipment
CZ2007727A3 (en) * 2007-10-18 2009-04-29 Nanopeutics S. R. O. Collecting electrode of a device for producing nanofibers by electrostatic spinning of polymer matrices and device comprising such collecting electrode
CZ2007729A3 (en) * 2007-10-18 2009-04-29 Elmarco S. R. O. Apparatus for producing a layer of nanofibers by electrostatic spinning of polymer matrices and collecting electrode for such an apparatus
CZ2007728A3 (en) * 2007-10-18 2009-04-29 Elmarco S. R. O. Apparatus for producing a layer of nanofibers by electrostatic spinning of polymer matrices
CA2703958A1 (en) * 2007-10-23 2009-04-30 Ppg Industries Ohio, Inc. Fiber formation by electrical-mechanical spinning
AU2014206173B2 (en) * 2007-11-20 2015-08-20 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
US7815427B2 (en) * 2007-11-20 2010-10-19 Clarcor, Inc. Apparatus and method for reducing solvent loss for electro-spinning of fine fibers
US7967588B2 (en) 2007-11-20 2011-06-28 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
WO2009067365A2 (en) 2007-11-20 2009-05-28 Clarcor Inc. Filtration medias, fine fibers under 100 nanofibers, and methods
US20090156740A1 (en) 2007-12-15 2009-06-18 Annette Lechtenboehmer Tire with component containing polymeric nanofiber
JP4879915B2 (en) * 2008-01-16 2012-02-22 パナソニック株式会社 Nanofiber manufacturing equipment, non-woven fabric manufacturing equipment
JP4907571B2 (en) * 2008-02-14 2012-03-28 パナソニック株式会社 Nanofiber manufacturing equipment, non-woven fabric manufacturing equipment
JP4960279B2 (en) * 2008-03-04 2012-06-27 パナソニック株式会社 Nanofiber manufacturing apparatus and nanofiber manufacturing method
JP4939467B2 (en) * 2008-03-12 2012-05-23 パナソニック株式会社 Nanofiber manufacturing method and nanofiber manufacturing apparatus
DE112009000438T5 (en) 2008-03-12 2011-03-17 Panasonic Corporation, Kadoma-shi Fiber production process, fiber manufacturing apparatus and proton exchange membrane fuel cell
JP4892508B2 (en) * 2008-03-12 2012-03-07 パナソニック株式会社 Nanofiber manufacturing method and nanofiber manufacturing apparatus
CA2718882C (en) 2008-03-20 2013-12-24 University Of Akron Ceramic nanofibers containing nanosize metal catalyst particles and medium thereof
JP4880638B2 (en) * 2008-05-07 2012-02-22 パナソニック株式会社 Nanofiber manufacturing equipment
WO2009122669A1 (en) * 2008-04-02 2009-10-08 パナソニック株式会社 Nanofiber manufacturing apparatus and nanofiber manufacturing method
CZ301226B6 (en) * 2008-04-09 2009-12-16 Elmarco S.R.O. Device for production of nanofibers through electrostatic spinning of polymer matrix
CZ302039B6 (en) * 2008-04-09 2010-09-15 Elmarco S.R.O. Method for spinning polymer matrix in electrostatic field and apparatus for making the same
JP4866872B2 (en) * 2008-04-10 2012-02-01 パナソニック株式会社 Nanofiber manufacturing apparatus and nanofiber manufacturing method
JP4972027B2 (en) * 2008-04-15 2012-07-11 パナソニック株式会社 Nanofiber manufacturing equipment, non-woven fabric manufacturing equipment
US20090266759A1 (en) * 2008-04-24 2009-10-29 Clarcor Inc. Integrated nanofiber filter media
RU2497983C2 (en) * 2008-06-24 2013-11-10 Стелленбош Юниверсити Method and apparatus for producing fine fibres
JP4965521B2 (en) * 2008-07-08 2012-07-04 パナソニック株式会社 Nanofiber manufacturing equipment
GB2462112B (en) * 2008-07-24 2012-11-07 Stfc Science & Technology An apparatus and method for producing fibres
US8894907B2 (en) * 2008-09-29 2014-11-25 The Clorox Company Process of making a cleaning implement comprising functionally active fibers
JP5627024B2 (en) * 2008-10-17 2014-11-19 ディーキン ユニバーシティ Electrostatic spinning assembly
US7669626B1 (en) 2008-11-07 2010-03-02 The Goodyear Tire & Rubber Company Tire with component containing polyketone short fiber and polyethyleneimine
US20100116403A1 (en) * 2008-11-07 2010-05-13 Ralf Mruk Tire with component containing polyketone short fiber and epoxidized polyisoprene
US20100116404A1 (en) * 2008-11-11 2010-05-13 Annette Lechtenboehmer Tire with component containing polyketone short fiber and functionalized elastomer
CZ2008763A3 (en) 2008-12-03 2010-06-16 Elmarco S.R.O. Process for preparing nanofibers and/or nanofibrous structures of phospho-olivines, phospho-olivine nanofibers and nanofibrous structure formed by nanofibers of phospho-olivines
US8172092B2 (en) * 2009-01-22 2012-05-08 Clarcor Inc. Filter having melt-blown and electrospun fibers
US20110196325A1 (en) * 2010-02-10 2011-08-11 Olaf Erik Alexander Isele Absorbent Article with Containment Barrier
US8859843B2 (en) 2009-02-27 2014-10-14 The Procter & Gamble Company Absorbent article with containment barrier
CZ2009149A3 (en) 2009-03-09 2010-09-22 Elmarco S.R.O. Method of laying polymer nanofiber functional layer on substrate surface
CZ2009152A3 (en) 2009-03-10 2010-11-10 Elmarco S.R.O. Layered filtration material and device for purification of gaseous medium
CZ302876B6 (en) * 2009-07-01 2011-12-28 Technická univerzita v Liberci Method of and device for producing nanofibers by flooded electrostatic spinning
CZ302699B6 (en) * 2009-07-27 2011-09-07 Student Science, s. r. o. Process for producing nanofiber-based nanopellets
CZ308360B6 (en) 2009-08-06 2020-06-24 Elmarco S.R.O. Rotary spinning electrode
US8257639B2 (en) 2009-09-22 2012-09-04 Kent State University Method of making stimuli responsive liquid crystal-polymer composite fibers
CZ305133B6 (en) 2009-11-27 2015-05-13 Technická univerzita v Liberci Method of and device for producing linear fiber formation comprising nanofibers
WO2011100414A1 (en) 2010-02-10 2011-08-18 The Procter & Gamble Company Absorbent article with bonded web material
WO2011100407A1 (en) * 2010-02-10 2011-08-18 The Procter & Gamble Company Web material(s) for absorbent articles
US20110210081A1 (en) * 2010-02-26 2011-09-01 Clarcor Inc. Fine fiber liquid particulate filter media
CZ302873B6 (en) * 2010-03-05 2011-12-28 Šafár@Václav Process for producing nanofibers by spinning polymeric solution in electrostatic field and apparatus for making the same
CZ303024B6 (en) * 2010-03-05 2012-02-29 Šafár@Václav Process for producing nanofibers by electrostatic spinning of polymeric solution and apparatus for making the same
CN101798710B (en) * 2010-03-11 2011-08-31 东华大学 Mechanical air bubble spinning device for preparing micron or nanometer fibers
CN101857976B (en) * 2010-05-19 2011-06-08 青岛大学 Device for preparing nano fibers with ordered arrangement and cross structures
TWI406982B (en) 2010-06-30 2013-09-01 Taiwan Textile Res Inst Roller type electrostatic spinning apparatus
CN102312296B (en) * 2010-06-30 2013-10-30 财团法人纺织产业综合研究所 Rolling drum-type electrospinning equipment
BR112012033414B1 (en) 2010-07-02 2021-07-13 The Procter & Gamble Company DISSOLVABLE FIBROUS BLANKET STRUCTURE ARTICLE INCLUDING ACTIVE AGENTS
CZ2010585A3 (en) 2010-07-29 2012-02-08 Elmarco S.R.O. Method of electrostatic spinning of polymer melt
CZ2010648A3 (en) 2010-08-30 2012-03-07 Elmarco S.R.O. Device for producing nanofibers
RU2447207C1 (en) * 2010-10-19 2012-04-10 Учреждение Российской академии наук Институт высокомолекулярных соединений РАН Method of producing nanofibres from aliphatic copolyamides
JP5473144B2 (en) * 2010-11-18 2014-04-16 勝 田丸 Nanofiber manufacturing method
CN101985793B (en) * 2010-11-22 2012-07-25 北京化工大学 Device for preparing non-woven fabric product continuously with electrostatic spinning method
CZ305107B6 (en) 2010-11-24 2015-05-06 Technická univerzita v Liberci Chromatographic substrate for thin-layer chromatography or for column chromatography
CZ201122A3 (en) 2011-01-17 2012-07-18 Royal Natural Medicine, S.R.O. Mouth-screen and process for producing thereof
CN102140701B (en) * 2011-03-21 2013-05-08 李从举 Porous sprayer electrostatic spinning device for preparing nano fibrofelt and preparation method thereof
CZ306438B6 (en) 2011-04-12 2017-01-25 Elmarco S.R.O. A method and a device for applying a liquid polymer matrix on spinning cords
CZ2011273A3 (en) * 2011-05-09 2012-07-18 Výzkumný ústav potravinárský Praha, v.v.i. Method of nozzleless centrifugal production of nanofibers and microfibers on the surface of rotating cylinders and apparatus for making the same
CZ2011299A3 (en) * 2011-05-18 2012-07-18 Výzkumný ústav potravinárský Praha, v.v.i. Method of nozzleless centrifugal production of nanofibers and microfibers by making use of rotating cylinders with profiled surface and apparatus for making the same
CZ2011306A3 (en) 2011-05-23 2012-12-05 Technická univerzita v Liberci Method of increasing hydrophobic properties of flat layer of polymeric nanofibers, a layer of polymeric nanofibers with increased hydrophobic properties and layered textile composite, which comprises such a layer
CZ303453B6 (en) 2011-07-14 2012-09-19 Elmarco S.R.O. Cell culturing substrate and process for producing thereof
CZ2011540A3 (en) 2011-08-30 2012-10-31 Vysoká Škola Bánská -Technická Univerzita Ostrava Process for preparing fibrous and lamellar microstructures and nanostructures by controlled vacuum freeze drying of nanoparticle liquid dispersion
US9469920B2 (en) * 2011-10-12 2016-10-18 Korea University Research And Business Foundation Electrospinning device
KR101382860B1 (en) * 2011-10-12 2014-04-08 고려대학교 산학협력단 Electrospinning apparatus with supersonic stream nozzle
JP5883614B2 (en) * 2011-10-25 2016-03-15 勝 田丸 Method for producing nanofiber laminate
US8496088B2 (en) 2011-11-09 2013-07-30 Milliken & Company Acoustic composite
EP2794972B1 (en) 2011-12-21 2018-08-01 E. I. du Pont de Nemours and Company Process for laying fibrous webs from a centrifugal spinning process
WO2013100638A1 (en) * 2011-12-30 2013-07-04 (주)엠엔에스이십일 Apparatus and method for preparing nanofiber web
KR101415302B1 (en) * 2012-05-09 2014-07-04 (주)엠엔에스21 Device for manufacturing a nano-fiber web and Method thereof
CZ304097B6 (en) 2012-01-19 2013-10-16 Contipro Biotech S.R.O. Combined spinning nozzle for producing nanofibrous and microfibrous materials
RU2477165C1 (en) * 2012-03-14 2013-03-10 Юрий Николаевич Филатов Filtration material, method of its production and application
CN102925996A (en) * 2012-04-10 2013-02-13 南京理工大学 Static electricity forming method adopting specific rotary drum
CN102704193A (en) * 2012-06-25 2012-10-03 威程(天津)科技有限公司 Non-woven cloth production device for multiple solid pin electrode nano fiber
CZ2012549A3 (en) * 2012-08-14 2013-06-19 Technická univerzita v Liberci Nanofibrous structure with immobilized organic agent and process for preparing thereof
CN102828261B (en) * 2012-09-18 2015-06-03 东华大学 Spinneret-free electrostatic spinning device and method for preparation of nano-fiber pipes
US9186608B2 (en) 2012-09-26 2015-11-17 Milliken & Company Process for forming a high efficiency nanofiber filter
JP5719421B2 (en) 2012-10-11 2015-05-20 花王株式会社 Electrospinning apparatus and nanofiber manufacturing apparatus having the same
CZ304124B6 (en) 2012-11-23 2013-11-06 Nafigate Corporation, A.S. Method of producing nanofibers by electrostatic spinning of a solution or melt of polymer and apparatus for making the same
SG11201504356RA (en) 2012-12-10 2015-07-30 Emd Millipore Corp Ultraporous nanofiber mats and uses thereof
CN102978718B (en) * 2012-12-11 2015-01-21 东南大学 Device and method for realizing mass production of nano-fibers through electrostatic spinning method
CZ201334A3 (en) 2013-01-18 2014-08-20 Technická univerzita v Liberci Sound-absorbing means containing at least one acoustic resonance membrane comprised of layer of polymeric nanofiber layer
CN103088443B (en) * 2013-01-28 2015-05-13 东华大学 Umbrella-shaped electrostatic spinning sprayer and electrostatic spinning method
WO2014131376A1 (en) 2013-02-26 2014-09-04 Elmarco S.R.O. Electrospun nanofibers comprising pharmaceutically active agents
CN103114347B (en) * 2013-03-08 2015-03-11 厦门大学 Continuous fiber-manufacturing device
EP3569262A1 (en) 2013-03-14 2019-11-20 Tricol Biomedical, Inc. Biocompatible and bioabsorbable derivatized chitosan compositions
US20140272359A1 (en) 2013-03-15 2014-09-18 The Procter & Gamble Company Nonwoven substrates
US20140259483A1 (en) 2013-03-15 2014-09-18 The Procter & Gamble Company Wipes with improved properties
EP2778270A1 (en) 2013-03-15 2014-09-17 Fibertex Personal Care A/S Nonwoven substrates having fibrils
US9205006B2 (en) 2013-03-15 2015-12-08 The Procter & Gamble Company Absorbent articles with nonwoven substrates having fibrils
US20140272223A1 (en) 2013-03-15 2014-09-18 The Procter & Gamble Company Packages for articles of commerce
US9504610B2 (en) 2013-03-15 2016-11-29 The Procter & Gamble Company Methods for forming absorbent articles with nonwoven substrates
CN103215660B (en) * 2013-03-28 2015-11-25 昆山同日精密测试设备有限公司 Electrospun nano-fibers equipment
CZ305569B6 (en) * 2013-03-29 2015-12-16 Technická univerzita v Liberci Method of preparing three-dimensionally shaped layer of polymeric nanofibers and method of covering a three-dimensionally shaped surface of a body by three-dimensionally shaped layer of polymeric nanofibers
CN103215661B (en) * 2013-04-07 2016-04-13 高小歌 A kind of electrostatic spinning apparatus and spinning process
CN103194806B (en) * 2013-04-25 2015-06-17 杨宝麟 Polymer solution electrostatic spinning component, device and method
CZ307624B6 (en) * 2013-05-10 2019-01-23 Technická univerzita v Liberci Composite material for filtration of combustion products and method of making such material
JP5948370B2 (en) * 2013-08-08 2016-07-06 花王株式会社 Nanofiber manufacturing apparatus, nanofiber manufacturing method, and nanofiber molding
EP2839949B1 (en) 2013-08-23 2016-10-12 W.L. Gore & Associates GmbH Process for the production of a structured film
EP3038732B1 (en) * 2013-08-29 2018-02-28 Mahle International GmbH Filter material, filter element, and a method for producing a filter material
US20160279550A1 (en) * 2013-08-29 2016-09-29 Mahle International Gmbh Filter material, filter element, and a method and a device for producing a filter material
CZ305320B6 (en) 2013-09-13 2015-07-29 Technická univerzita v Liberci Linear core-shell type textile formation containing a shell of polymer nanofibers and filtering device for filtering gaseous media
CN103469492B (en) * 2013-09-22 2015-08-19 北京化工大学 A kind of electrospun fibers deposition homogenizer and method
JP2015081390A (en) * 2013-10-22 2015-04-27 積水化学工業株式会社 Electrospinning device
CN103726110B (en) * 2013-12-11 2015-12-09 哈尔滨工业大学深圳研究生院 A kind of electrospinning device and the method for the preparation of electrostatic spinning thereof
JP2015132028A (en) * 2014-01-15 2015-07-23 積水化学工業株式会社 Electrospinning apparatus
WO2015124251A1 (en) 2014-02-20 2015-08-27 Merck Patent Gmbh Method for the preparation of fibers from a catalyst solution, and articles comprising such fibers
CN114796017A (en) 2014-04-22 2022-07-29 宝洁公司 Composition in the form of a soluble solid structure
JP6205674B2 (en) * 2014-04-23 2017-10-04 株式会社Roki Method for producing fine fiber
SG10201911354UA (en) 2014-06-26 2020-02-27 Emd Millipore Corp Filter structure with enhanced dirt holding capacity
HUE059173T2 (en) 2014-09-10 2022-10-28 Procter & Gamble Nonwoven web
CZ2014674A3 (en) 2014-09-30 2016-04-13 Nafigate Cosmetics, A.S. Application method of cosmetic preparation containing at least one active substance to skin and means for this cosmetic preparation application method l
CN104451910B (en) * 2014-11-10 2017-06-06 厦门大学 The electric spinning equipment that jet fixed point induces
CZ306536B6 (en) * 2014-11-26 2017-03-01 AUDACIO, s. r. o. A device for producing submicron fibres and nanofibres in an electrostatic field
CZ2014947A3 (en) 2014-12-22 2016-06-22 Technická univerzita v Liberci Process for producing textile composite material containing polymeric nanofibers and textile composite material containing polymeric nanofibers
KR101638910B1 (en) * 2015-02-27 2016-07-12 경북대학교 산학협력단 apparatus having screw collector with sawtooth to manufacture polymer composite nano fiber and method using it
CZ2015159A3 (en) 2015-03-06 2016-10-05 Technická univerzita v Liberci Vascular prosthesis, especially small-diameter vascular prosthesis
CZ307884B6 (en) 2015-03-09 2019-07-24 Technická univerzita v Liberci Method for production of textile composite especially for outdoor applications, which contains at least one layer of polymer nanofibers, and in this way prepared textile composite
CN104775169B (en) * 2015-04-08 2017-02-01 刘千祥 Synchronous circulation type spiral sealing belt device for electrostatic spinning
CZ2015441A3 (en) 2015-06-26 2017-03-01 Pegas Nonwovens S.R.O. An absorbent sanitary product comprising a nonwoven fabric with barrier properties
CN104911721A (en) * 2015-07-06 2015-09-16 苏州大学 Electrostatic spinning device for producing nanofiber in batches
JP6591817B2 (en) * 2015-07-30 2019-10-16 花王株式会社 Electrospinning device
CN105442065B (en) * 2015-11-13 2018-05-22 广东工业大学 A kind of a large amount of centrifugation pneumoelectric spinning equipments for preparing three-dimensional manometer fibrous framework
CN105350095A (en) * 2015-11-13 2016-02-24 广东工业大学 Airflow-assisted centrifugal spinning device
CZ2015928A3 (en) 2015-12-21 2017-06-28 Technická univerzita v Liberci A method of producing polymeric nanofibres by electrical spinning of a polymer solution or melt, a spinning electrode for this method, and a device for the production of polymeric nanofibres fitted with at least one of these spinning electrodes
CN105483841B (en) * 2015-12-31 2017-08-01 安徽元琛环保科技股份有限公司 A kind of many shower nozzle circulation electrospinning devices and its method of work
JP6586019B2 (en) * 2016-01-12 2019-10-02 株式会社エアード An apparatus for producing a nonwoven fabric or woven fabric containing nanofibers.
CN105568404B (en) * 2016-01-27 2017-11-24 广东工业大学 A kind of Self inhaling stirring liquid supply electrostatic spinning apparatus
EP3413936A4 (en) 2016-02-12 2019-11-20 Tricol Biomedical, Inc. Chitosan superfine fiber systems
EP3419577B1 (en) 2016-02-25 2020-05-06 AVINTIV Specialty Materials Inc. Nonwoven fabrics with additive enhancing barrier properties
CN105648548A (en) * 2016-03-08 2016-06-08 西安工程大学 Tapered-bulge roller type electrostatic spinning device and method for preparing nanofiber membrane by adopting device
CN105937055A (en) * 2016-06-27 2016-09-14 佛山轻子精密测控技术有限公司 Cylindrical-surface spiral-line-array-distribution-mode electrostatic-spinning needle-tip induction nozzle
CN106087079B (en) * 2016-07-28 2019-01-29 东华理工大学 The production method and device of electrostatic spinning
CZ306923B6 (en) 2016-10-06 2017-09-13 Nafigate Corporation, A.S. A method of depositing a layer of polymeric nanofibres prepared by electrostatic spinning of a polymer solution or melt into electrically non-conductive materials, and a multilayer composite comprising at least one layer of polymeric nanofibres prepared this way
WO2018162950A1 (en) 2017-03-07 2018-09-13 The Stellenbosch Nanofiber Company (Pty) Ltd Apparatus and method for the production of fine fibers
RU174492U1 (en) * 2017-03-31 2017-10-17 Георгий Онуфриевич Волик DEVICE FOR ELECTROFORMING A NONWOVEN MATERIAL
CN111107927A (en) 2017-07-21 2020-05-05 默克密理博有限公司 Nonwoven fibrous membranes
AU2018330936A1 (en) 2017-09-08 2020-03-26 Board Of Regents Of The University Of Texas System Mechanoluminescence polymer doped fabrics and methods
US11174570B2 (en) 2018-02-05 2021-11-16 Fermi Research Alliance, Llc Methods and systems for electrospinning using low power voltage converter
KR101870156B1 (en) * 2018-02-06 2018-06-25 한국화학연구원 Drum type melt-electro spinning apparatus for mass production of Nano-fiber and the method of Solvent-free Melt-electro spinning
CZ201874A3 (en) * 2018-02-15 2019-09-11 Inocure S.R.O. Electrode for surface electrostatic processing of polymeric materials
CN108166080A (en) * 2018-03-22 2018-06-15 北京化工大学 A kind of dipping liquid formula electrostatic spinning apparatus
RU2690816C1 (en) * 2018-03-22 2019-06-05 Российская Федерация, от имени которой выступает Федеральное государственное казенное учреждение "Войсковая часть 68240" Method of producing nano-sized fibrous materials
CN108385174A (en) * 2018-04-24 2018-08-10 东华大学 A kind of separation control electric field porous spherical electrostatic spinning nozzle and its spinning process
CN108411383B (en) * 2018-04-24 2021-04-06 东华大学 Porous spherical electrostatic spinning nozzle and spinning method thereof
CN108660521B (en) * 2018-05-03 2021-03-05 东华大学 Spherical electrostatic spinning nozzle for controlling electric field distribution under fixed spinning solution curvature and application thereof
CN108611687B (en) * 2018-05-03 2021-03-05 东华大学 Porous nanofiber batch preparation device and application method thereof
WO2020059267A1 (en) * 2018-09-18 2020-03-26 富士フイルム株式会社 Method and equipment for producing nonwoven fabric
RU2697772C1 (en) * 2018-10-04 2019-08-19 Закрытое акционерное общество "МОСТ" Textile non-woven electric-spinning material with multicomponent active modifying additives and method of its production
EP3877574A1 (en) 2018-11-01 2021-09-15 EMD Millipore Corporation Efficient production of nanofiber structures
CN109629015A (en) * 2018-12-28 2019-04-16 李瑞锋 A kind of separation control electric field Round Porous cylindricality electrostatic spinning apparatus and its spinning process
CA3129491A1 (en) * 2019-02-14 2020-08-20 The Uab Research Foundation An alternating field electrode system and method for fiber generation
US11427937B2 (en) 2019-02-20 2022-08-30 The Board Of Regents Of The University Of Texas System Handheld/portable apparatus for the production of microfibers, submicron fibers and nanofibers
CN109750360B (en) * 2019-03-21 2021-05-25 东华大学 Self-cleaning spiral electrostatic spinning nozzle and use method thereof
CN111041566B (en) * 2019-03-22 2021-11-02 大连民族大学 Combined electrostatic spinning experimental device based on gravity stepped electric field
CN110230107A (en) * 2019-04-23 2019-09-13 上海云同纳米材料科技有限公司 Needleless electrostatic spinning head and electrostatic spinning generating device
CN114072675A (en) 2019-04-30 2022-02-18 康奈尔大学 Polymer fibers having a backbone with a positively charged component comprising zwitterionic moieties
WO2020223638A1 (en) 2019-05-01 2020-11-05 Ascend Performance Materials Operations Llc Filter media comprising polyamide nanofiber layer
WO2021014413A1 (en) * 2019-07-24 2021-01-28 Nanoshields Technology Limited Device and method for applying nanofibers and/or microfibers onto a substrate, and system comprising the devices
US20210254248A1 (en) 2020-02-18 2021-08-19 Emd Millipore Corporation Sterilizable porous filtration media containing nanofiber
CZ202169A3 (en) * 2021-02-16 2022-08-24 Technická univerzita v Liberci A method of spinning a polymer solution or melt using alternating current and the equipment for this
EP4166699A1 (en) 2021-10-14 2023-04-19 Technicka univerzita v Liberci Biocompatible and biodegradable fibrous structure containing silica-based submicron fibers, biogenic ions and with a functional surface for binding active substances and a method of its production

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1346231A (en) 1970-06-29 1974-02-06 Bayer Ag Filter made of electrostatically spun fibres
US4143196A (en) 1970-06-29 1979-03-06 Bayer Aktiengesellschaft Fibre fleece of electrostatically spun fibres and methods of making same
US4069026A (en) 1970-06-29 1978-01-17 Bayer Aktiengesellschaft Filter made of electrostatically spun fibres
US3994258A (en) * 1973-06-01 1976-11-30 Bayer Aktiengesellschaft Apparatus for the production of filters by electrostatic fiber spinning
US6624261B1 (en) * 1997-02-18 2003-09-23 E. I. Du Pont Nemours And Company Catalytic polymerization process
IL119809A (en) 1996-12-11 2001-06-14 Nicast Ltd Device for manufacture of composite filtering material and method of its manufacture
WO2000022207A2 (en) 1998-10-01 2000-04-20 The University Of Akron Process and apparatus for the production of nanofibers
IL132945A0 (en) 1999-06-07 2001-03-19 Nicast Ltd Filtering material and device and method of its manufacture
US6753454B1 (en) 1999-10-08 2004-06-22 The University Of Akron Electrospun fibers and an apparatus therefor
US20020084178A1 (en) 2000-12-19 2002-07-04 Nicast Corporation Ltd. Method and apparatus for manufacturing polymer fiber shells via electrospinning
DE10063518C2 (en) 2000-12-20 2003-11-20 Sandler Helmut Helsa Werke Process for the electrostatic spinning of polymers to obtain nano and microfibers
US6713011B2 (en) 2001-05-16 2004-03-30 The Research Foundation At State University Of New York Apparatus and methods for electrospinning polymeric fibers and membranes
DE10136256B4 (en) 2001-07-25 2005-03-31 Helsa-Werke Gmbh & Co. Kg Apparatus for producing fibers in an electrostatic spinning process
US6520425B1 (en) 2001-08-21 2003-02-18 The University Of Akron Process and apparatus for the production of nanofibers
KR100422460B1 (en) * 2002-02-01 2004-03-18 김학용 A down-up type eletrospinning aparatus

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8721319B2 (en) 2008-03-17 2014-05-13 Board of Regents of the University to Texas System Superfine fiber creating spinneret and uses thereof
US8828294B2 (en) 2008-03-17 2014-09-09 Board Of Regents Of The University Of Texas System Superfine fiber creating spinneret and uses thereof
US9750829B2 (en) 2009-03-19 2017-09-05 Emd Millipore Corporation Removal of microorganisms from fluid samples using nanofiber filtration media
US9623352B2 (en) 2010-08-10 2017-04-18 Emd Millipore Corporation Method for retrovirus removal
US8709309B2 (en) 2011-02-07 2014-04-29 FibeRio Technologies Corporation Devices and methods for the production of coaxial microfibers and nanofibers
US8778240B2 (en) 2011-02-07 2014-07-15 Fiberio Technology Corporation Split fiber producing devices and methods for the production of microfibers and nanofibers
US8777599B2 (en) 2011-02-07 2014-07-15 Fiberio Technology Corporation Multilayer apparatuses and methods for the production of microfibers and nanofibers
US8658067B2 (en) 2011-02-07 2014-02-25 Fiberio Technology Corporation Apparatuses and methods for the deposition of microfibers and nanofibers on a substrate
US9394627B2 (en) 2011-02-07 2016-07-19 Clarcor Inc. Apparatuses having outlet elements and methods for the production of microfibers and nanofibers
US8647541B2 (en) 2011-02-07 2014-02-11 Fiberio Technology Corporation Apparatuses and methods for the simultaneous production of microfibers and nanofibers
US8647540B2 (en) 2011-02-07 2014-02-11 Fiberio Technology Corporation Apparatuses having outlet elements and methods for the production of microfibers and nanofibers
US11154821B2 (en) 2011-04-01 2021-10-26 Emd Millipore Corporation Nanofiber containing composite membrane structures
CZ304099B6 (en) * 2012-12-17 2013-10-16 Technická univerzita v Liberci Method of and apparatus for producing nanofibrous fabric, especially for colonization with living organisms
US9931777B2 (en) 2013-12-10 2018-04-03 The University Of Akron Simple device for economically producing electrospun fibers at moderate rates
US10675588B2 (en) 2015-04-17 2020-06-09 Emd Millipore Corporation Method of purifying a biological material of interest in a sample using nanofiber ultrafiltration membranes operated in tangential flow filtration mode
WO2023237139A1 (en) * 2022-06-09 2023-12-14 Technicka Univerzita V Liberci A method of producing a linear nanofibrous structure in an alternating electric field, a device for performing this method and a device for producing a nanofibrous thread

Also Published As

Publication number Publication date
BRPI0414163A (en) 2006-10-31
DK1673493T3 (en) 2009-11-16
PT1673493E (en) 2009-10-12
RU2365686C2 (en) 2009-08-27
CA2536595A1 (en) 2005-03-17
CZ20032421A3 (en) 2004-11-10
ES2329578T3 (en) 2009-11-27
JP2007505224A (en) 2007-03-08
ZA200601791B (en) 2006-10-25
CY1110534T1 (en) 2015-04-29
DE602004021951D1 (en) 2009-08-20
US20060290031A1 (en) 2006-12-28
KR20060079211A (en) 2006-07-05
RU2006108868A (en) 2006-08-10
CA2536595C (en) 2011-08-02
EP1673493A1 (en) 2006-06-28
AU2004270787A1 (en) 2005-03-17
ATE435934T1 (en) 2009-07-15
KR101143934B1 (en) 2012-05-09
CN1849418B (en) 2012-07-04
IL173881A0 (en) 2006-07-05
SI1673493T1 (en) 2009-12-31
JP4439012B2 (en) 2010-03-24
CZ294274B6 (en) 2004-11-10
WO2005024101A1 (en) 2005-03-17
PL1673493T3 (en) 2009-12-31
US7585437B2 (en) 2009-09-08
AU2004270787B2 (en) 2010-06-17
IL173881A (en) 2010-11-30
CN1849418A (en) 2006-10-18

Similar Documents

Publication Publication Date Title
EP1673493B1 (en) A method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method
Alghoraibi et al. Different methods for nanofiber design and fabrication
Bera Literature review on electrospinning process (a fascinating fiber fabrication technique)
US8747093B2 (en) Electrostatic spinning assembly
US7351052B2 (en) Apparatus for producing nanofiber utilizing electospinning and nozzle pack for the apparatus
EP1637637B1 (en) Method and apparatus of producing fibrous aggregate
JP2006112023A (en) Method for producing fiber assembly and apparatus for producing the fiber assembly
CN109097849B (en) Nanofiber generating device
WO2007013858A1 (en) Method & apparatus for producing fiber yarn
Ramakrishnan et al. Needleless Electrospinning Technology –An Entrepreneurial Perspective
SE530751C2 (en) Device for making nanofibre
TW201542900A (en) Method of manufacturing ultrafine fiber
JP2006152479A (en) Apparatus for producing ultra fine fiber and method for producing the same using the apparatus
CZ2011273A3 (en) Method of nozzleless centrifugal production of nanofibers and microfibers on the surface of rotating cylinders and apparatus for making the same
CZ302901B6 (en) Method of producing functional nanofibrous layer and apparatus for making the same
Rafiei Nanofiber Production Capability of Electro-Centrifuge Technique
Yan Advanced slot needleless electrospinning and air filtration properties of slot electrospun nanofibres
Rafiei A comparative study on electrocentrifuge spinning and electrospinning process as two different nanofiber creation techniques
CN112760823A (en) Nanofiber electrostatic spinning equipment
CZ303298B6 (en) Method of nozzleless centrifugal manufacture of nanofibers and micro-fibers using rotating cylinders with profiled surface and apparatus for making the same
CZ22711U1 (en) Apparatus for nozzleless centrifugal manufacture of nanofibers using rollers with profiled surface

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060327

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

RAX Requested extension states of the european patent have changed

Extension state: MK

Payment date: 20060323

Extension state: AL

Payment date: 20060323

Extension state: LT

Payment date: 20060323

Extension state: LV

Payment date: 20060323

17Q First examination report despatched

Effective date: 20080215

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602004021951

Country of ref document: DE

Date of ref document: 20090820

Kind code of ref document: P

REG Reference to a national code

Ref country code: RO

Ref legal event code: EPE

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20091002

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: R. A. EGLI & CO. PATENTANWAELTE

Ref country code: CH

Ref legal event code: PCOW

Free format text: TECHNICKA UNIVERZITA V LIBERCI;STUDENTSKA 2;461 17 LIBEREC 1 (CZ)

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: TECHNICKA UNIVERZITA V LIBERCI

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20090402507

Country of ref document: GR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2329578

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: EE

Payment date: 20090922

Year of fee payment: 6

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: TECHNICKA UNIVERZITA V LIBERCI

Effective date: 20091118

REG Reference to a national code

Ref country code: FR

Ref legal event code: CA

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E006711

Country of ref document: HU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090708

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100409

REG Reference to a national code

Ref country code: SK

Ref legal event code: T3

Ref document number: E 6993

Country of ref document: SK

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: HU

Payment date: 20100714

Year of fee payment: 7

Ref country code: MC

Payment date: 20100817

Year of fee payment: 7

Ref country code: RO

Payment date: 20100729

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BG

Payment date: 20100805

Year of fee payment: 7

Ref country code: LU

Payment date: 20100922

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20100720

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20100825

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CY

Payment date: 20100719

Year of fee payment: 7

REG Reference to a national code

Ref country code: EE

Ref legal event code: MM4A

Ref document number: E003868

Country of ref document: EE

Effective date: 20100930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20110920

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20110826

Year of fee payment: 8

Ref country code: FI

Payment date: 20110907

Year of fee payment: 8

Ref country code: SI

Payment date: 20110818

Year of fee payment: 8

Ref country code: SK

Payment date: 20110907

Year of fee payment: 8

Ref country code: PL

Payment date: 20110818

Year of fee payment: 8

Ref country code: AT

Payment date: 20110830

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20110922

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20111013

Year of fee payment: 8

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20120308

LTLA Lt: lapse of european patent or patent extension

Effective date: 20110908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110930

REG Reference to a national code

Ref country code: GR

Ref legal event code: ML

Ref document number: 20090402507

Country of ref document: GR

Effective date: 20120403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120403

Ref country code: RO

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110908

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20130401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120908

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120909

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 435934

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110908

REG Reference to a national code

Ref country code: SI

Ref legal event code: KO00

Effective date: 20130422

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 6993

Country of ref document: SK

Effective date: 20120908

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120908

Ref country code: BG

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120630

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120909

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121001

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130401

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20131018

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120909

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120908

REG Reference to a national code

Ref country code: PL

Ref legal event code: LAPE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230609

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20230822

Year of fee payment: 20

Ref country code: IT

Payment date: 20230921

Year of fee payment: 20

Ref country code: IE

Payment date: 20230927

Year of fee payment: 20

Ref country code: GB

Payment date: 20230927

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230927

Year of fee payment: 20

Ref country code: DE

Payment date: 20230927

Year of fee payment: 20

Ref country code: BE

Payment date: 20230927

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20231004

Year of fee payment: 20